advanced power management

I had my computer worked on. When I got it back I can not get it to take my scanner. It is a Hewlett Packard Scan-Jet 5100c. It worked fine before but now it says to wait while it finishes but I don't have anything on. On the advanced power management support it has a question mark and an exclamation point by it.It also tell me to put my Windows 98 back in the cd rom. I have done this over and over. It tells me there is no drive for it. I have done all I know to do and nothing works. I don't know if you can help but if you could I would appreciate it very much. If you don't know could you please tell me who could help me.
Thank you so much.

try this, highlite the advanced power manag. and click remove, and the same on any other question marks or double entries in the device manager , then go to start /shutdown and hit restart in dos mode, then in dos mode type C:\scanreg/fix and then reboot ,
windows will redecover this and if prompted for win98 cd you will have to browse it to the win 98 dir on the cd , then if scanner doesn't work ,, reinstall the program that came with it

2) as the computer is restarting, you will see an instruction that says press F2 or del to enter setup ( might be another key ). hit that key when prompted.

3) In CMOS setup, look for Power Management Configuration, Power Management Setup, etc. There might be a tab at the top which just says power but most likely, you will have to look under Advanced CMOS setup or Advanced Chipset Setup. You will use your arrow keys to navigate these screens.

4) When you find Power Management Setup, the first option will be APM, Advanced Power Management, or Power Saving Features. Make sure that's enabled and everything below it is disabled. You will change the settings by either A) highlighting the option to change and hitting enter to bring up a submenu to choose from or B) highlighting the option and hitting Page Up/Page Down or the +/- keys on the number keypad. Some features will not let you disable them. DOn't worry about them.

5) Once you have APM enabled and all subcomponents disabled, hit F10 to exit and save changes. If this does nothing, hit escape to get back to tha last screen and then F10. If this does not work, there might be an Exit tab at the top. Use your right arrow key to get there and choose Exit Saving Changes.

OK did that but I still have a big x on the scanner. In the device manager on
Other devices it has a question mark on it and the arm that come down from it has a ? and ! on them. They say Hewlett packard on three of them and on the last on it says HP C5190A.
Hope there is still hope that you can help me with this problem.
Thank you so much for your time.

When I put the CD in for setup. I went to the add new hardware wizard. It says window found and installed the following plug and play devices:
Hewlett-Packard Scanjet 5100C
But it has a big yellow question mark in front of it.
I was just clicking on everything I could because I am getting tired. It say in one place that window has not installed a drive for this device.
I went to start and opened the scanner and it said: Your scanner is currently being acessed by another application. Please wait for the other application to finish or close it to allow Hp scan access. Do you want ot run HP Scanner without the scanner. Yes or No. I don't know what else to do.

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